Research Article

An Experimental Novel Study: Angelica sinensis Prevents Epidural Fibrosis in Laminectomy Rats via Downregulation of Hydroxyproline, IL-6, and TGF-β1

Table 1

Rydell classification.

Grade 0Epidural scar tissue was not adherent to the dura mater
Grade 1Epidural scar tissue was adherent to the dura mater but easily dissected
Grade 2Epidural scar tissue was adherent to the dura mater and difficultly dissected without disrupting the dura matter
Grade 3Epidural scar tissue was firmly adherent to the dura mater and could not be dissected